Visiting local bars in Tachilek is more fun when you know what the weather holds. These rainfall averages and temperatures can help you choose the best time for bar hopping. The hottest months are usually April and March with an average temp of 80°F, while the coldest months are January and December with an average of 68°F. The rainiest months in Tachilek are August, July, September, and June, with each month seeing an average of 13 inches of rainfall.